content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.github.eugene.kamenev.tsmp4j.stats;
  
  import com.github.eugene.kamenev.tsmp4j.utils.Buffer;
  import java.util.function.DoubleFunction;
  
  public interface RollingWindowStatistics<S extends WindowStatistic> extends DoubleFunction<S> {
  
      Buffer.ObjBuffer<S> getStatsBuffer();
  
      Buffer.DoubleBuffer getDataBuffer();
  
      default double x(int i) {
          return this.getStatsBuffer().get(i).x();
      }
  
      default double mean(int i) {
          return this.getStatsBuffer().get(shiftIndex(i)).mean();
      }
  
      default double stdDev(int i) {
          return this.getStatsBuffer().get(shiftIndex(i)).stdDev();
      }
  
      default boolean skip(int i) {
          return this.getStatsBuffer().get(shiftIndex(i)).skip();
      }
  
      default boolean isReady() {
          return this.getDataBuffer().isFull();
      }
  
      default int shiftIndex(int i) {
          return i + windowSize() - 1;
      }
  
      default int windowSize() {
          return this.getDataBuffer().getLength();
      }
  
      default int dataSize() {
          return this.getStatsBuffer().getLength();
      }
  }
  